linux-kernel - [PATCH] usb: gadget: bdc: 64-bit pointer capability check

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Message-Id: <1497517762-29825-1-git-send-email-srinath.mannam@broadcom.com>
Date:   Thu, 15 Jun 2017 14:39:22 +0530
From:   Srinath Mannam <srinath.mannam@...adcom.com>
To:     Felipe Balbi <balbi@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        bcm-kernel-feedback-list@...adcom.com,
        Srinath Mannam <srinath.mannam@...adcom.com>
Subject: [PATCH] usb: gadget: bdc: 64-bit pointer capability check

Corrected the register to check the 64-bit pointer
capability state. 64-bit pointer implementation capability
was checking in wrong register, which causes the BDC
enumeration failure in 64-bit memory address.

Fixes: efed421a94e6 ("usb: gadget: Add UDC driver for
Broadcom USB3.0 device controller IP BDC")

Signed-off-by: Srinath Mannam <srinath.mannam@...adcom.com>
---
 drivers/usb/gadget/udc/bdc/bdc_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/udc/bdc/bdc_core.c b/drivers/usb/gadget/udc/bdc/bdc_core.c
index ccb9c21..e9bd8d4 100644
--- a/drivers/usb/gadget/udc/bdc/bdc_core.c
+++ b/drivers/usb/gadget/udc/bdc/bdc_core.c
@@ -475,7 +475,7 @@ static int bdc_probe(struct platform_device *pdev)
 	bdc->dev = dev;
 	dev_dbg(bdc->dev, "bdc->regs: %p irq=%d\n", bdc->regs, bdc->irq);
 
-	temp = bdc_readl(bdc->regs, BDC_BDCSC);
+	temp = bdc_readl(bdc->regs, BDC_BDCCAP1);
 	if ((temp & BDC_P64) &&
 			!dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64))) {
 		dev_dbg(bdc->dev, "Using 64-bit address\n");
-- 
2.7.4